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G. C. CHASE MULTIPLIER MECHANISM FOR CALCULATING MACHINES 15 Shets-Shet 15 Filed March 1.5. 1926 INVENTOR Patented Sept. 18. 1928.

Warren STATE-S PATENT OFFKCE.

GEORGE C. CHASE, OF SOUTH ORAN GEJNEW JERSEY, ASSIGNOR T MONROE CALCU- LATING MACHINE COMPANY, OF ORANGE, NEW JERSEY, A CORPORATION OF DEL A- WARE.

MULTIPLIER MECHANISM FOR CALCULATING MACHINES.

Application filed March 15, 1926. Serial No. 94,968.

This invention relates to means for accomplishing multiplication in calculating machines, such, forinstance as the revers1b.e cycle calculator disclosed in Patent No.

1,566,650, issued to Geo. C. Chase, on Dec. 22,

1925, entitled Operating means for calcula tors, being shown as applied to a machine constructed in accordance with the reissue patent to Baldwin, No. 13.841, as modified by the Patent No. 1,474,230, issued to E. F.

Britten, J r., Nov. 13, 1923, and by the above noted patent to Chase.

An object of the invention is to provide multiplier key mechanism, whereby the depression of a key will determine the number of times that an amount set up on the multiplicand keys will be added upon the numeral Wheels; in combination with means for terminating an operation upon an overrun of the tens carrying mechanism.

- A further object is to provide a bank of multiplier keys with locking devices, whereby the depression of one key of the bank will lock theother keys until the partial product determined by the depressed key is registered.

Another object is to provide means whereby the locked keys are automatically released and the depressed key restored to raised position when the registration determined by the depressed key has been completed; or, the registration having been completed, when the operator releases the depressed key.

The invention consists in the novel construction and combination of parts as set forth in the appended claims.

In the accompanying drawings illustrating the invention,

Figure 1 is a plan view of a calculating machine to which the invention is shown as applied.

Fig. 2 is a right hand side view of the same with the casing broken away.

Fig. 3 is a section on line 33 of Fig. 1.

Fig. 4 is a detail section taken on line 44 of Fig. 1.

Fig. 5 is a detail side view with the casing broken away, showing the locater cam.

Fig. 6 is a detail side view of the clutching and reversing mechanism.

Fig. 7 is a detail section on the line 77 of Fig. 6.

Fig. 8 is a perspective view of the starting mechanism, with. the add key shown depressed.

Fig. 9 is a similar view with the subtract key shown depressed.

Fig. 10 is a section on line 1010 of Fig. 1, showing the multiplier mechanism.

Fig. 11 1s a planular section on line 11-11 of Fig. 10, with the multiplier selecting rack shown in norm-a1 position.

12 is a similar view, with parts in the position taken upon depression of the 5 key.

Fig. 13 is a similar View, with the 5 key depressed and the selecting rack advanced four spaces.

Fig. 14 is a detail section on line 1414 of Fig. 10, showing a multiplier key and associated parts in normal position.

Fig. 15 is a similar view, with the multiplier key shown as depressed.

Fig. 16 is a similar view, showing the means whereby a depressed multiplier key must be released before another may be depressed.

Fig. 17 is a detail front view of the multiplier selecting mechanism, showing the locking bail held in active position.

Fig. 18 is a detail front view of the locking bail and latch in released position.

Fig. 19 is a left. hand side view of the machine with thecasing broken away, showing the parts in normal position.

Fig. 20 is a detail side view of parts hidden in Fig. 19.

' Fig. 21 is a detail side view of the stopping mechanism, with parts in position taken upon depression of the add, or partial depression of a multiplier 'key.

Fig. 22 is a similar View showing the parts 1n position taken upon release of the keyand before the restoration of the clutch lever to neutral.

23 is a similar view, with the parts in position as arrested at the end of an additive movement. 2

Fig. 24 is a similar view, with the parts shown as returned from the position of Fig. 23 to full cycle position.

Fig. 25 is a similar view, with the parts shown as returned from the position in Fig. 24 to position with the rebound stopped and the multiplier locking bail released.

Fig. 26 is a perspective view of the starting mechanism, with the parts in position asmeans for actuating all of the clamping devices, together with equalizing devices in the power drive. Fig. 3 is a view similar to Fig. 2 but showing fiuid actuated power means for controlling the clamping devices. Fig. l is a side view of Fig. 23 certain parts being broken away better to illustrate the invention. Fig. 5 is an end View of Fig. 4, also with certain parts broken away. Fig. 6 is a vertical section showing one form of manual means for actuating the clamping devices. Fig. 7 is a section on the line 77 of Fig. 6. Fig. 8 is a section on the line 88 of Fig. 6. Fig. 9 is a vertical section of another form of manual means for actuating the clamping devices. Fig. 10 is a detail section on the line 1010 of Fig. 9. Y

Referring more particularly to the drawings the invention is disclosed as associated with a radial drill comprising a column C, radial-arm A and the usual drill-head D adjustably mounted on the arm. Within the drill-head is journaled a spindle S adapted to receive a drill-point or other suitable tool. Power to translate the arm vertically on the column and to rotate the spindle may be provided by a motor M, or other prime-mover, preferably located at the foot of the column and such power may be controlled by suitable mechanism which, being conventional, need not be described. Machine-tools of this type are usually provided with or mounted upon a base which in turn is secured to a suitable stationary foundation or floor. A base of this nature is illustrated at B which, however, when used in connection with the present invention is not permanently secured in any definite position but which instead is adapted to be moved relative to its support. This invention relates particularly to the means permitting transportation of the base and means for securing it either temporarily or permanently in any desired location. Obviously any type of machine-tool could be so mount-ed, transported and secured in position, therefore it is to be understood that the inven tion is adaptable to various other machinetools and is not limited to radial-drills.

To facilitate the transportation of the machine its base is preferably provided with suitable anti-frirtion devices such, as for example wheels or rollers 1. Preferably these anti-friction devices are guided to move in a predetermined path. This may conveniently be accomplished by forming the wheels with ide flanges and fitting them upon suitable tracks such as the rails 2. Adjacent the wheels 1 the base is provided with locking devices 3 which, when the base and the machine-tool thereon has been moved to any desired location, may be actuated to secure the base to some immovable object such as, for example, the rails 2. These locking devices preferably comprise vertically movable clamping blocks 4 having jaws 5 and 6 adapted upon upward movement to engage the under-side of the head of the rail 2. Thus the rail-head is gripped between the lower surface of the wheels 2 and the jaws 5 and 6 and the machine base is held against movement both vertically and horizontally.

These blocks l are fitted within heavy brackets ecured to the base 13 and are held against rotary movement t. *"in in any suit able iranuer. As shown 1 s. 7, 8 and 9 this may be accomplished by forming the blocks with polygonal portions 4; and fitting them within similarly shaped sockets 7 in brackets. Thus the blocks are held gainst rotation and the jaws 5 and 6 are therefore prevented from binding upon the webs of the rails 2.

An important feature of this invention res des in the employment of the double gripping aws 5 and 6 adapted simultaneously to grip the rail head at opposite sides of the central web, thereby drawing the machine base firmly to the rails without creating any side strain on the clamping mechanism or on the rail.

As hereinbefore stated either manual means or power means may be utilized to actuate the clamps. Figs. 9 and 10 illustrate one simple and effective means for accomplishing this result manually. In this form the blocks 4 are vertically movable in brackets 7 secured to the base B. Each of these blocks are provided with a threaded aperture 8 into which is threaded a screw 9 held against endwise movement in the bracket by collars 10 and 11. Upon the upper end of the screw is carried a hand-wheel 12 by means of which the screw may be manually rotated. To effect final tightening of the clamp and to release it when it is desired to move the machine, the wheel is preferably secured to the screw 9 by means of a lost motion connection which permits a partial rotation of the wheel relative to the screw whereby the wheel may be caused to strike a hammer blow on the screw to give it a final or initial rotary movement. This may be effected by securing upon the upper end of the screw, as by fitting it to a squared end 13, a sector 14% affording radial walls 15 and 16. The hub 17 of the wheel 12 is formed with cavity 18 larger than the sector and within which the latter is held. This cavity 18 terminates at one end in a stopwall 19 adapted in one direction of rotation of the hand-wheel to engage the wall 15. The opposite end of the cavity affords a wall 20 adapted to contact with the wall 16 when the hand-wheel is rotated in the opposite direction. Due to the lost motion bet-ween the wall 15 and 19. and 16 and 20 these walls may be brought together forcibly to produce a. final setting or an initial release of the clamp. A cover-plate 21 and a nut 22 serve to hold the parts in their assembled relation.

Another manual means for rotating the the spring to raise pawl 136, whereupon the contact of lug 141 with lug 142 will raise the forward end of lever 31 and trip stop element 25, to stop the machine at full-cycle position (see Fig. 22).

Arm 24 of the stop'mechanism is prov ded at its upper end (shown as pivoted coaxially with element 25) with a laterally yieldable spring tooth 149, normally abutting against lug 148 of releasing pawl 136. Upon depression of pawl 136, consequent upon depression of the add, the subtract or a multiplier key, lug 148 will move downwardly past tooth 149 and spring 138, moving said pawl, w ll bring lug 148 beneath tooth 149 (see Fig. 21). Upon release of the key, pawl 136 will rise and its lug 148 will raise tooth 149 against the tension of its spring (see Fig. 22) in wh ch position it will remain until arm 24 is carried forward, against stop 29 in the operation of the stopping means, when tooth 149 w ll be released and will resume a position in line with lug 148. In the rebound of the parts following contact of arm 24 with stop 29, the lug 30 of stop element 25 will pass below the forward end of lever 31, the latter being held in raised position by releasing pawl 136. Tooth 149 will now contact with lug 148 and move the releasing pawl to bring its lug 141 from beneath lug 142, whereupon the releasing pawl will be raised by the releasing lever spring to normal position, and lever 31 will fall and rest upon lug 30. Stop element 25 has-thus been allowed to remain in contact with rock-lever 22, and link 21 moving through dead center position, the parts Wlll be stopped a second time, should the rebound thereof be suflicient (see Fig. 25), following which stop element 25 will be restored to normal restrained position by contact of lug 30 thereof with the end of lever 31, as in Fig. 20. Division is accomplished upon this machine preferably by the method of repeated subtraction and the determination of a quotient figure may be made automatic by means of a special stop control, as follows:

The devisor setup on the keyboard being subtracted, by holding down subtract key 121, one more than the number of times it is contained in the corresponding portion of the dividend registered in wheels 13, a negative numeral wheel reading is obtained, the higher order numeral wheels 13 passing to a registration of nine as far to the left as carry over mechanism is provided. The carry pin 9 (Fig. 19) of the numeral wheel which is in position to be acted upon by the extreme left-hand carry tooth 7' (Fig. 3) will lie in such relation to lever 31 as to operate a cam end 32 of said lever as the wheel passes to 9. (Fig. 19) thereby raising the forward end of lever 31 and releasing stop element 25, to bring the machine to rest. In the machine illustrated, the stopping of the actuators will not be purely automatic, since if the operator continues to hold down the subtract key, the machine will immediately resume the operation. The return of the reversing clutch lever 111 to neutral position, resulting from the tripping of element 25, will, however, through parts 128, and 125., communicate a slight upward movement to subtract key 121, this movement serving as a signal to the operator to remove finger pressure from the key. The wheel 85 which is being operated at the time will now register one more than the true quotient, and a corrective additive operation is performed, by depressing add key 120. This will cause the carry teeth to return the wheels 13 reading nine to, a zero registration, and the pin g of the left hand wheel will again operate lever 31 and release the stop, whereupon the machine is brought to rest with the proper quotient figure upon wheel 85 and the proper remainder upon wheels 13. The use of the carriage 2 in continuing the division is well-known and needs no description.

Multiplier mechanism. Figs. 1047'.

According to the embodiment of the invention illustrated herein, the following multiplier devices are provided, which cooperate with the mechanism hereinbefore described to provide for the automatic determination of product figures.

A bail 250, pivoted to the framing at 251, 251, carries a slide 252 secured thereon by a pin and slot connection, the slide being held in rearward position by means of a spring 253. The lower ends of bail 250 are extended past the pivots 251 at 284 below the lower keyboard plate, and contact with a locking bail 254, also pivoted upon and depending from pivots 251, 251. An intermediately fulcrumed lever 255 engages a perforation 256 of bail 250, said lever forming in effect a depending extension of said bail. 'A spring 257 holds bail 250 and lever 255 normally in position with said hail engaging a stop 258 (Fig. 17). Slide 252 is provided with lateral spaced teeth 259, which in the normal position of the slide lie within notches 260 of the stems of the multiplier keys 261 (Fig. 14). The notch 260 of each multiplier key has an upper inclined edge 262, terminating at the lower edge of a shallow notch 263, the inner or stop wall of which is located in a plane of movement intersecting an intermediate point of said cam face. Upon depression of a multiplier key cam face 262 engaging the tooth 259 of slide 252, will rock bail 250 to the left until the tooth escapes from said edge, when the bail will assume an intermediate position, where it will be held by engagement of tooth 259 with the stop wall of notch 263 in which position the multiplier key will be in its fully depressed position, further depression of the key is prevented by engagement of a suitable stop, and return of the key to raised too position by its spring is prevented by engagement of notch 263 with tooth 259 (Fig. The free ends 284 of bail 250 abut against a flange 264 of locking bail 254, so that as bail 250 is rocked toward the left, the bail 254 will be rocked toward the right, where it will lie beneath the spring pawls 265, of the multiplier keys not depressed, whereby these keys will be locked in raised position.

This locking of the multiplier keys in raised position will prevent confusion of the registration by depression of a second key before completion of the registration determined by the first key. Such confusion might occur, in the'illustrated embodiment of the invention, from an attempt to correct a multiplier figure; and also in certain practical methods of operation, wherein the operator may have occasion to depress multiplier keys in rapid succession, without any time lapse or intermediate operation of any kind. The confusion might occur in the registration of any successive multiplier figures, should the invention be applied to a machine equipped with an automatic shift for the numeral wheel carriage.

Bail 250 and lever 255 having been rocked to extreme position by partial depression of the multiplier key, an inclined edge 266 of the lower arm of said lever will contact with the roller 267, mounted at the end of an arm 268 secured to rock shaft 125, and by depressing said roller will rock the shaft 125 in a counterclockwise direction as viewed in Fig. 10. This movement. as previously explained, will start the machine in rotation in an additive direction while bail 250 is in its intermediate position, shaft 125," lever 128 and lever 134 will hold pawl 136 sufliciently depressed to avoid the tripping of trigger 31 (Figs. and 26).

In order to stop the machine at the end of a number of cycles of operation determined by the multiplier key which has been depressed, the following mechanism is provided:

On slide 252 (Figs. 10-13) is mounted a pawl 269, which as bail 250 is rocked to the left will engage the rack teeth 270 formed in bar 271 slidably supported on the framing of the machine, and provided with a roller 272 engaged by the forked end of a lever 273 fulcrumed at 274 to the framing and bearing a (ill hand position of'slide 252, pawls 269 and 278 yield sli htly, and will remain in engagement with their rack teeth in the intermediate position of the-bail and slide, when the tooth 259 of the latter enters the notch 263 of the key. The teeth 259 on slide 252 which, as stated, lock down the multiplier keys, vary in breadth, the tooth cooperating with the 1 key being ada ted to be moved out of register with the eys upon forward movement of slide 252 one step; the tooth cooperating with the 2 key normally extending rearwardly of the key stem a sufficient distance to register therewith until slide 252 has been moved forwardly two steps, etc. progressively, until the slide 252 to return to its normal rearward position under the action of spring 253. The return of bail 250 to normal position also restores lever 255 to normal osition, releasing roller 267 and shaft 125, w ereby the actuating means will be stopped in the manner previously described.

It has been stated that upon return of shaft 125 to normal position upon release of the add, subtract or a multiplier key, the machine will continue in operation until the actuators reach full cycle position. Preferably, in the construction illustrated, cam 276 will advance slide 252 in the mid-cycle position of the numeral wheel actuating means, and for this reason it is desirable to prevent the depression of a multiplier key during the interval between the release of the key previously depressed and the completion of the stopping action. For this purpose a spring latch 280 (Figs. 17 and 18) is provided to hold the locking bail 254 in engagement with the pawls 265 of the keys. In normal operation, finger pressure upon the multiplier key being removed before the release of the key from slide tooth 259, the multiplier key spring 285 will restore the key to raised position, the pawl 265 of said key yielding as it is moved past locking bail 254 and returning to normal position above said bail, to lock the key against a'sec- 0nd depression before the machine has been brought to rest. In effecting the stop, rock arm 24 is brought against stop 29 and the parts are allowed to rebound, as previously stated, until the crank connections 20, 21 having passed through dead center position, arm 24 is again brought into contact with stop 29. During the first or additive contact with the stop the push rod 47 ivoted to arm 24 will be held by pin 50 of ink 21 out of contact with a lever 283. During the rebound, the parts moving in a subtractive direction, pin will hold the push rod 47 in position of contact with lever 283, so that the latter will be actuated and a cam arm 281 thereof brought against latch 280 to move the same and release locking bail 254. The locking bail, being released, is returned to normal position by spring 282 and the multiplier keys are free to be depressed.

It it desirable that any operative impulse imparted to a multiplier key should become effective (provided pressure is continued until the key yields under the finger), even though an operator attempts to depress it while it is still locked by bail 254, the machine not having completed a previous multiplier operation. At this time pawl 265 acts like a rigid part of the multiplier key, pressure on the key pressing this pawl forcibly against lock bail 254, and unless these parts are properly related, pawl 265 would tend to bind the bail 254 and prevent itfrom releasing the key when latch 280 releases bail 254. If, however, the lower end of pawl 265 is provided with a slight camming angle, as shown in the drawings, pressure applied to the multiplier key will tend to force bail 254 toward its normal position, so that when latch 280 is released pawl 265 will cam over the bail 254 and the multiplier key will be free to initiate the intended multiplier operation.

Should a multiplier key be held in depressed position by the operator, bail 250 will return to its normal position at the proper time and the machine will be stopped in accordance with the "alue of the key. In such case slide 252 will be held in forward position by engagement of its projection 259 .with the front face of the key stem. Upon manual release of the key slide 252 will return to normal position.

The multi lier. mechanism is so designed that during t e depression of a multiplier key the subtract key will be locked in raised position, and during the depression of the subtract ke the multiplier keys will be locked in raise position. This is due in the first instance to the latching of bail 250 and lever 255 in the position shown in Fig. 15 upon the depression of a multiplier key, whereb the rise of roller 267 and the rocking of sha t 125 in a clockwise direction from the position shown in Fig. 26 will be prevented. On the other hand, depression of the subtract key (Fig. 9) will act to raise roller 267 to a position above the cam edge 266 of lever 255 and in the path of movement of said lever, whereby bail 250, slide 252 and keys 261 will be locked in the position shown in Fig. 14.

Should a transitional carry occur in multiplication, owing to accumulation upon numeral wheels 13, in excess of the capacit provided by the carr mechanism, the multiplier means are designed to permit reversing clutch lever 111 to be moved to neutral position, since the bail now stands in an intermediate position determined by the stop wall of notch 263 of the key. Shaft 125 and setting lever 128, therefore, stand in a partially retracted position, wherein pin 130 is allowed sufficient movement in slot 129 to provide for said movement of lever 111 to neutral. Under such conditions, the loss of carry will, of course, give an incorrect registration upon the numeral wheels, and it is desirable that the error be called to the attention of the operator. This is done by the stopping of the machine with the multiplier keys remaining locked, since the key locks are not released until the successive revolutions of cam 276 have advanced slide 252 sufliciently to bring the tooth thereof out of registration with the ke notch.

The loss of carry being noted, it is necessary to continue the interrupted rotations until the multiplier keys are released. The tripping of trigger 31 by the numeral wheels will leave pawl 136 set to trip said trigger again upon release of the multiplier key. Depression of the add key will serve to move shaft 125 from the position illustrated in Fig. 26 to that of Fig. 8, whereupon the clutch will be re-engaged in additive position. Finger pressure being immediately removed from the add key, pawl 136 will be held depressed until the release of the multiplier key, whereupon the operation will be terminated. It is to be noted that upon interuption of the operation, the subtract key will remain ineffective, and that any key capable of re-engaging the clutch will act under these conditions to complete the multipl ier operation.

Rotation of crank handle 3, attached to driving gear 76, would also serve to continue the multiplication and advance the slide. Upon the final cycle of predetermined operation, the multiplier keys will be released, this serving as a signal to the operator to bring the parts to rest with the crank handle in fullcycle position. The loss of carry having been noted, the operator may, if desired, correct the product reading by moving the carriage and registering the numeral 1 in the proper place.

I claim:

1. In a calculating machine having numeral wheels, actuating means therefor, driving means for said actuating means including a motor, and a clutch between said driving means and said actuating means, a plurality of multiplier keys of differing numerical value, a control member movable upon depression of any multiplier key and held thereby in position to effect the clutch and to determine additive registration upon said numeral wheels, a member progressively advanced in the operation of said actuating means and acting to release said control mem- Ill] 

